Climate Insights for Río Blanco

The climate in Río Blanco is warm and mild. The average annual temperature is 20°C and approximately 1975mm of precipitation falls per year. Río Blanco receives a notable amount of rainfall throughout the year, including during its driest month. Río Blanco is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, August, June. The coldest months are January, December, February, when temperatures can drop to 11°C.

Río Blanco sees moderate temperature variation throughout the year, ranging from 11°C to 27°C. The warmest month is May, when average highs reach 27°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 11°C and an average of 16°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 2°C shift in average temperatures.

Río Blanco is a fairly wet location, receiving approximately 1975mm of precipitation annually, which averages out to around 165mm per month. The wettest month is June, averaging 276mm of rainfall. September and October also tend to see above-average precipitation. The driest month is February, with just 68mm. That's 208mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Río Blanco is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently summer in Río Blanco, which began on June 21, 2026. Río Blanco is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 27°C, while the coldest stretch bottoms out in January near 11°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Río Blanco is during February and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 74mm per month. By contrast, May can be uncomfortably hot with highs reaching 27°C, while January is the coldest period with lows dropping to 11°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Río Blanco based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.